Jigang Wang patiently explained his latest discovery in quantum control that could lead to superfast computing based on quantum mechanics. He mentioned light-induced superconductivity without energy gap. He brought up forbidden supercurrent quantum beats. And he mentioned terahertz-speed symmetry breaking.
Then he backed up and clarified all that. After all, the quantum world of matter and energy at terahertz and nanometer scales – trillions of cycles per second and billionths of meters – is still a mystery to most of us.
“I like to study quantum control of superconductivity exceeding the gigahertz, or billions of cycles per second, bottleneck in current state-of-the-art quantum computation applications,” said Wang, a professor of physics and astronomy at Iowa State University whose research has been supported by the Army Research Office. “We’re using terahertz light as a control knob to accelerate supercurrents.”
Superconductivity is the movement of electricity through certain materials without resistance. It typically occurs at very, very cold temperatures. Think -400 Fahrenheit for “high-temperature” superconductors.
Terahertz light is light at very, very high frequencies. Think trillions of cycles per second. It’s essentially extremely strong and powerful microwave bursts firing at very short time frames.
Wang and a team of researchers demonstrated such light can be used to control some of the essential quantum properties of superconducting states, including macroscopic supercurrent flowing, broken symmetry and accessing certain very high frequency quantum oscillations thought to be forbidden by symmetry.
It all sounds esoteric and strange. But it could have very practical applications.
“Light-induced supercurrents chart a path forward for electromagnetic design of emergent materials properties and collective coherent oscillations for quantum engineering applications,” Wang and several co-authors wrote in a research paper just published online by the journal Nature Photonics.
In other words, the discovery could help physicists “create crazy-fast quantum computers by nudging supercurrents,” Wang wrote in a summary of the research team’s findings.
Finding ways to control, access and manipulate the special characteristics of the quantum world and connect them to real-world problems is a major scientific push these days. The National Science Foundation has included the “Quantum Leap” in its “10 big ideas” for future research and development.
“By exploiting interactions of these quantum systems, next-generation technologies for sensing, computing, modeling and communicating will be more accurate and efficient,” says a summary of the science foundation’s support of quantum studies. “To reach these capabilities, researchers need understanding of quantum mechanics to observe, manipulate and control the behavior of particles and energy at dimensions at least a million times smaller than the width of a human hair.”
Wang and his collaborators – Xu Yang, Chirag Vaswani and Liang Luo from Iowa State, responsible for terahertz instrumentation and experiments; Chris Sundahl, Jong-Hoon Kang and Chang-Beom Eom from the University of Wisconsin-Madison, responsible for high-quality superconducting materials and their characterizations; Martin Mootz and Ilias E. Perakis from the University of Alabama at Birmingham, responsible for model building and theoretical simulations – are advancing the quantum frontier by finding new macroscopic supercurrent flowing states and developing quantum controls for switching and modulating them.
A summary of the research team’s study says experimental data obtained from a terahertz spectroscopy instrument indicates terahertz light-wave tuning of supercurrents is a universal tool “and is key for pushing quantum functionalities to reach their ultimate limits in many cross-cutting disciplines” such as those mentioned by the science foundation.
And so, the researchers wrote, “We believe that it is fair to say that the present study opens a new arena of light-wave superconducting electronics via terahertz quantum control for many years to come.”
The Latest on: Quantum computing
via Google News
The Latest on: Quantum computing
- ProBeat: AWS and Azure are generating uneasy excitement in quantum computingon December 13, 2019 at 10:30 am
Last week, AWS announced Amazon Braket, a cloud service that lets you tap into quantum hardware providers D-Wave, IonQ, and Rigetti. At the Q2B 2019 quantum computing conference this week, I got a ...
- Quantum computing: Technology-enabled bus delivers smarter public transporton December 13, 2019 at 4:20 am
One of the first production uses of quantum computing could prove another marker for the emerging technology.
- Quantum computer sets new record for finding prime number factorson December 13, 2019 at 3:25 am
Quantum computers could one day threaten the safety of the internet by breaking encryption – and now they are a step closer. A quantum computing start-up company called Zapata has worked with IBM to ...
- Quantum computing will be the smartphone of the 2020s, says Bank of America strategiston December 12, 2019 at 10:40 am
When asked what invention will be as revolutionary in the 2020s as smartphones were in the 2010s, Bank of America strategist Haim Isreal said, without hesitation, “quantum computing”. At the bank’s ...
- Revolt! Scientists Say They're Sick of Quantum Computing's Hypeon December 12, 2019 at 7:16 am
Posting anonymously, they began to comment on purported breakthroughs in quantum computing—claims that the technology will speed up artificial intelligence algorithms, manage financial risk in banks, ...
- Quantum computing leaps ahead in 2019 with new power and speedon December 12, 2019 at 5:19 am
Quantum computers are getting a lot more real. No, you won't be playing Call of Duty on one anytime soon. But Google, Amazon, Microsoft, Rigetti Computing and IBM all made important advances in 2019 ...
- Forget quantum supremacy: This quantum-computing milestone could be just as importanton December 11, 2019 at 3:39 am
A local bus bouncing its way through downtown Lisbon and onto its elegant waterfront might seem an unlikely vehicle to deliver the weird future of quantum computing. The bus itself is unremarkable, ...
- Calculating energy derivatives for quantum chemistry on a quantum computeron December 11, 2019 at 2:33 am
Quantum computers are at the verge of providing solutions for certain classes of problems that are intractable on a classical computer. 1 As this threshold nears, an important next step is to ...
- Amazon Plugs Quantum Cloud Computing Braket Into AWSon December 10, 2019 at 9:26 pm
Moorhead made a note of the most impactful, one of which was a preview of AWS’s comprehensive quantum computing strategy. Adding quantum cloud computing to AWS was not only a logical evolutionary step ...
- Microsoft and Ford try using quantum-style computing to solve Seattle’s traffic problemon December 10, 2019 at 6:59 pm
Traffic congestion in Seattle can get so bad that it seems as if you need a next-generation quantum computer to make sense of it — and that’s exactly what Microsoft and Ford are aiming to do. The ...
via Bing News